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Ruby: Merging variables in to a string
... For that the string must include placeholders. Put your arguments into an array and use on of these ways:
(For more info look at the documentation for Kernel::sprintf.)
fmt = 'The %s %s the %s'
res = fmt % [animal, action, other_animal] # using %-operator
res = sprintf(fmt, animal, action, other_...
How to iterate over rows in a DataFrame in Pandas
...n example if A is numeric and B is string, to_numpy() will cast the entire array to string, which may not be what you want. Fortunately zipping your columns together is the most straightforward workaround to this.
*Your mileage may vary for the reasons outlined in the Caveats section above.
An Obv...
How to add new column to MYSQL table?
...'My_Table_Name';
$your_column = 'My_Column_Name';
if (!in_array($your_column, $wpdb->get_col( "DESC " . $your_table, 0 ) )){ $result= $wpdb->query(
"ALTER TABLE $your_table ADD $your_column VARCHAR(100) CHARACTER SET utf8 NOT NULL " //you can add ...
How can I count text lines inside an DOM element? Can I?
...es.length;
It can return the height of each line, and more. See the full array of things it can do by adding this to your script, then looking in your console log.
console.log("");
console.log("message_lines");
console.log(".............................................");
console.dir(message_line...
JPA : How to convert a native query result set to POJO class collection
...> type, Object[] tuple){
List<Class<?>> tupleTypes = new ArrayList<>();
for(Object field : tuple){
tupleTypes.add(field.getClass());
}
try {
Constructor<T> ctor = type.getConstructor(tupleTypes.toArray(new Class<?>[tuple.length]));
retur...
vector::at vs. vector::operator[]
...x is being incremented in complex ways, and continually used to look up an array. In such cases, it's much easier to ensure correct checks using at().
As a real-world example, I have code that tokenises C++ into lexical elements, then other code that moves an index over the vector of tokens. Depe...
Swift and mutating struct
...ted as either constants (via let) or variables (via var)
Consider Swift's Array struct (yes it's a struct).
var petNames: [String] = ["Ruff", "Garfield", "Nemo"]
petNames.append("Harvey") // ["Ruff", "Garfield", "Nemo", "Harvey"]
let planetNames: [String] = ["Mercury", "Venus", "Earth", "Mars", ...
Return two and more values from a method
...
You can achieve this returning an array too, like
def sumdiff(x, y)
[x+y, x-y]
end
which seems functionally equivalent to
def sumdiff(x, y)
return x+y, x-y
end
share
...
setting y-axis limit in matplotlib
...out by a factor of 0.1
factor = 0.1
new_xlim = (xlim[0] + xlim[1])/2 + np.array((-0.5, 0.5)) * (xlim[1] - xlim[0]) * (1 + factor)
axes.set_xlim(new_xlim)
I find this particularly useful when I want to zoom out or zoom in just a little from the default plot settings.
...
Good examples of Not a Functor/Functor/Applicative/Monad?
...ich is an Applicative, but not a Monad:
newtype T a = T {multidimensional array of a}
You can make an Applicative out of it, with something like:
mkarray [(+10), (+100), id] <*> mkarray [1, 2]
== mkarray [[11, 101, 1], [12, 102, 2]]
But if you make it a monad, you could get a dimension...